Microstructure evolution of A356 alloy under compound field
Microstructure evolution of A356 alloy under compound field
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DOI：
10.1016/j.jallcom.2009.04.125
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发表时间：
2009-09
影响因子：
6.2
通讯作者：
Zhongtao Zhang;Jie Li;Hongyun Yue;Jian Zhang;Tingju Li
中科院分区：
文献类型：
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作者：
Zhongtao Zhang;Jie Li;Hongyun Yue;Jian Zhang;Tingju Li
采用复合场（功率超声场和旋转电磁场的组合）对A356合金的微观组织进行改性。研究了复合场对A356合金凝固的影响，并通过光学显微镜和扫描电子显微镜（SEM）对所得样品进行了表征。结果表明：（1）原铝和共晶硅均显着细化； (2)在复合场下凝固过程中，枝晶原铝变成球状，片状共晶硅变成棒状。还初步讨论了复合场下微观结构演化的机制。
Compound field (combination of power ultrasonic field and rotating electromagnetic field) was used to modify the microstructure of A356 alloy. The effect of compound field on the solidification of the A356 alloy was investigated and the obtained samples were characterized by optical microscopy and scanning electron microscopy (SEM). The results showed that: (1) both the primary aluminum and eutectic silicon were significantly refined; (2) the dendritic primary aluminum became spherical, and the plate-like eutectic silicon turned into rod-like during the solidification process under compound field. The mechanism of the microstructure evolution under compound field was also preliminarily discussed.